Open AccessИнфракрасные спектры комплекса фторотан-триметиламин в сжиженном криптоне
Author(s) -
С.М. Меликова,
K. S. Rutkovskiǐ
Publication year - 2021
Publication title -
optika i spektroskopiâ
Language(s) - English
Resource type - Journals
eISSN - 2782-6694
pISSN - 0030-4034
DOI - 10.21883/os.2021.04.50774.296-20
Subject(s) - fermi resonance , overtone , anharmonicity , chemistry , resonance (particle physics) , ab initio , enthalpy , ab initio quantum chemistry methods , spectral line , atomic physics , infrared spectroscopy , thermodynamics , physics , condensed matter physics , organic chemistry , molecule , astronomy
The IR absorption spectra of solutions of mixtures of halothane (C2HBrClF3) and trimethylamine ((CD3) 3N) in liquefied krypton were obtained and analyzed. Bands assigned to weak hydrogen-bonded complexes have been identified. The enthalpy of formation was estimated in a series of temperature experiments on the change in the integral intensities of the bands of monomers and complexes An extremely strong increase in the intensity of the second-order bands attributed to the first overtone of the bending CH vibrations of halothane was found. The effect is determined by strong anharmonic interactions of a resonant nature (Fermi resonance and Darling-Dennison resonance). The results of ab initio calculations reproduce the effects observed in the experiment.